Psychoneuroimmunology investigates the interactions between the brain and the body. Just like exercise turns out to be equally beneficial to the brain as it is to any other system in the body, a mindfulness or meditative practice is as good for the body as it is for the mind. Afterall, a person is a whole being rather than simply the sum of its parts. If you do not have a meditative practice, religious, spiritual, or otherwise, I encourage you to seek one out. UCLA Mindful Awareness Research Center offers free downloadable short (3-19 minutes duration) guided meditations to get you started.